Articles tagged with Evolution
Researchers have linked unpredictable rainfall to cooperative breeding in birds, particularly among African starlings living in savannas. This evolutionary adaptation allows more chicks to survive over long periods of uncertain environmental conditions.
Researchers found that when species colonize the deep sea, large-bodied species become smaller and small-bodied species become larger. This pattern is consistent with the island rule, which states that isolated animals evolve to be larger or smaller based on their environment.
The brain's craving for a fix motivates humans to absorb knowledge at an optimal rate, driven by the release of natural opiates. This theory, proposed by USC Professor Irving Biederman, suggests that knowledge addiction has strong evolutionary value due to its correlation with perceived intelligence.
A new model of Titan's evolution, developed by the University of Nantes and University of Arizona, proposes that methane-rich ice stores the moon's atmospheric methane supply. The study validates data from ESA's Huygens probe, showing that methane outgassing occurs through cryovolcanic eruptions, producing temporary flows on the surface.
Species diversity varies greatly across tropical and temperate regions due to differing ecological pressures. Higher rates of evolutionary diversification may contribute to observed gradients in richness.
Researchers used quantitative data to analyze the evolution of acritarchs, a group of ancient microfossils. They found that complexity increased over time but leveled off, with post-Ediacaran acritarchs reaching high levels of morphological complexity but not large sizes.
The Field Museum is part of a 15-20 year program to fill in the Tree of Life, using genetic studies, fieldwork and existing information. The project aims to determine evolutionary relationships among bird species and other groups, with applications in disease research, conservation and ecosystem restoration.
Researchers found that certain fish muscles specialized for fast mating calls are now mutually exclusive with other functions like swimming. The study, on toadfish Opsanus tau, reveals the limitations of biological systems when optimized for one function.